I could see the adjustable stinger being handy if you trade trucks often or tow the same TT with more than one truck. Once you dial in the height to a TV/TT combo there is no need for further adjustments. If you keep your vehicles a long time the adjustable part is not very useful IMO, and you're stuck with the extra weight as lantley points out.
I do the same as Cobra, periodically remove the dust caps on the main bearings and look for water, dirt, etc. So far they are clean and dry so I have not seen the need to re-pack. They are essentially wheel bearings, except they don't see the high speeds and heat that wheel bearings do, so the there's no reason for the grease to break down unless it gets contaminated.
Call Hensley and order the bronze bushing for the spring bars and get the emergency kit while you're on the phone with them. Be sure to give the spring bars at least 10 pumps each with the grease gun to make sure they are fully lubed. I killed 2 bushings before I figured out I wasn't greasing the bars enough.
I posted this pic a while back but a search wouldn't bring up the thread. One of the jack tubes stripped its threads and wouldn't go up or down. I had a length of chain in the truck and made this field repair. Measured the tensioned length of the good jack tube and approximated how many links, then adjusted the good side to match the length of chain so they were both equal. Jacked the tongue waaay up to get the chain on. Best part was that it towed just like normal about 2 hrs home!
